<?php
// Copyright 2004-present Facebook. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

interface FileDetector {

  /**
   * Try to detect whether the given $file is a file or not. Return the path
   * of the file. Otherwise, return null.
   *
   * @param string $file
   *
   * @return null|string The path of the file.
   */
  public function getLocalFile($file);
}
